FH135, FH270 Error Codes

PL - Water Flow Switch Failure

Problem	1: Insufficient water flow 2: Plumbing connected backwards 3: Flow switch failure 4: Motherboard failure
Solution	1: Make sure the water is circulating back to pool 2: Check the plumbing lines 3: Make sure the water IN from the filter is connected to the bottom port

PC - Level 1 & Level 2 Anti-Freeze Protection In

Problem	The air temperature is too low and unit is on standby
Solution	Wait for outside air temperature to increase

P1 - Coil Temperature Sensor Failure

Problem	Software crash OR Sensor failure
Solution	1: Turn the heater off directly at the breaker for 45 seconds and restart the unit 2: Replace the sensor

P2 - Compressor Exhaust Temperature Failure

Problem	Software crash OR Sensor failure
Solution	1: Turn off the heater directly at the breaker for 45 seconds and restart the unit 2: Replace the sensor

P3 - Inlet Water Temperature Sensor Failure

Problem	Software crash OR Sensor failure OR Open circuit
Solution	1: Turn off the heater directly at the breaker for 45 seconds and restart the unit 2: Check the wire and connection 3: Replace the sensor 4: Replace the motherboard

P4 - Outlet Water Temperature Sensor Failure

Problem	Software crash OR Sensor failure OR Open circuit
Solution	1: Turn off the heater directly at the breaker for 45 seconds and restart the unit 2: Check the wire and connection 3: Replace the sensor 4: Replace the motherboard

P6 - Excessive Temperature Difference for IN and OUT Sensors

Problem	1: Low water flow 2: Motherboard failure
Solution	1: Check water circulation 2: Check water temperature 3: Replace the motherboard

P7 - Ambient Temperature Sensor Failure

Problem	Software crash OR Sensor failure
Solution	1: Turn off the heater directly at the breaker for 45 seconds and restart the unit. 2: Replace the sensor

P8 - Excessively Low Outlet Water Temperature in Cooling Mode

Problem	1: Low water flow rate 2: Water inlet water temperature too low 3: Motherboard failure
Solution	1: Turn off the heater directly at the breaker for 45 seconds and restart the unit 2: Check the water flow through the heater 3: Adjust the set temperature to a higher level 4: Replace the motherboard

P9 - Low Freon Pressure

Problem	1: Low refrigerant 2: Capillary block 3: Pressure switch connections need to be checked 4: Pressure switch failure 5: Motherboard failure
Solution	1: Add refrigerant* 2: Replace the capillary* 3: Repair the switch wires 4: Replace the pressure switch* 5: Replace the motherboard

E2 - Excessive Temperature Difference for IN and OUT Sensors

Problem	1: Low water flow rate 2: Inlet water temperature is too low 3: Motherboard failure
Solution	1: Check water circulation 2: Check water temperature 3: Replace the motherboard

E3 - Excessively High Compressor Temperatures

Problem	1: Low water flow rate 2: Low refrigerant 3: Water temperature is set too high 4: Pressure switch wiring failure 5: Pressure switch failure 6: Motherboard failure
Solution	1: Check pool's water circulation 2: If using a bypass valve, increase the flow to the heater 3: Drain and recharge the refrigerant** 4: Reduce desired temperature setting 5: Check the wiring of the switch 6: Replace the pressure switch* 7: Replace the motherboard

E4 - High Freon Pressure

Problem	1: Low water flow rate 2: Overcharged refrigerant 3: Water temperature is set too high 4: Pressure switch wiring failure 5: Pressure switch failure 6: Motherboard failure
Solution	1: Check pool's water circulation 2: If using a bypass valve, increase the flow to the heater 3: Drain and recharge the refrigerant** 4: Reduce desired temperature setting 5: Check the wiring of the switch 6: Replace the pressure switch* 7: Replace the motherboard

E5 - Cooling Coil Temperature Sensor Failure

Problem	Software crash OR Sensor failure
Solution	1: Turn the heater off directly at the breaker for 45 seconds and restart the unit 2: Replace the sensor

E6 - Suction Temperature Sensor Failure

Problem	Software crash OR Sensor failure
Solution	1: Turn the heater off directly at the breaker for 45 seconds and restart the unit 2: Replace the sensor

E8 - Communication Failure

Problem	1: Digital controller failure 2: Communication line is disconnected, damaged, or unplugged from the motherboard 3: Motherboard failure
Solution	1: Replace the digital controller 2: Repair, re-install, or replace the plug wire 3: Replace the motherboard

WARNING

It is strongly advised that customers or non-HVAC certified technicians do not attempt any repairs on the refrigerant coil system or attempt to refill the refrigerant (such as Freon) in the heat pump. These systems require precise amounts of refrigerant, and improper handling can lead to significant damage to the internal components, void warranties, and pose safety risks. Always seek professional assistance from a certified HVAC technician for any refrigerant-related issues or repairs.

FH135, FH270 Error CodesUpdated 6 months ago